MEASUREMENT AND ANALYSIS OF RUNNING : Application of Bioelectrical Impedance and Distance-Velocity Meter

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Other Title
  • ランニングの計測と解析 : 生体電気インピーダンスと距離・速度計の応用

Description

This paper describes motion analyses during running which used distance-velocity meter and bioelectrical impedance method. The distance-velocity meter is constructed of a rotary encoder, a string of high strength and high elasticity, and a guide wire. It gives information on the distance and velocity of the runner in every running point with high precision. A lower leg electrical impedance is used in this bioelectrical impedance method. This method gives information on landing point, take-off point, ankle angle and so on during running. Impedance wave form is able to observe intuitively the motion of running and to divide the running period. Using these results, we can analyze running in relation to stride length, pitch,running speed and running form. First, the measurement system is described in terms of construction, performance and measure ment method. The accuracy of measurement in distanceis ±(0.03%+0.8cm). The accuracy of measurement in velocity of running is 1% for an average distance over 48cm. The non-linearity of impedance measurement by telemetry is ±0.5% to the extent of ±10 ohms. The measuring area is about 100m from the antenna. Next, the method of running is analyzed. Impedance wave form during running is discussed in relation to the running motion. The results show that the characteristics of various running forms appear in the wave form of lower leg impedance. The stride length is also determined with the accuracy of about 1%. Last, this method is applied for 100m and middle-distance races, and discussed. This measurement system is simple and easy to handle. Hence, it can also be used for analysis of other field and track events-hurdle races or running broad jump, for example.

Journal

  • Biomechanisms

    Biomechanisms 11 (0), 43-55, 1992

    Society of Biomechanisms

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